EP3107925B1 - Process for the production of 21-methoxy-11-beta-phenyl-19-nor-pregna-4,9-diene-3,20-dione derivatives - Google Patents

Process for the production of 21-methoxy-11-beta-phenyl-19-nor-pregna-4,9-diene-3,20-dione derivatives Download PDF

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Publication number
EP3107925B1
EP3107925B1 EP15708050.8A EP15708050A EP3107925B1 EP 3107925 B1 EP3107925 B1 EP 3107925B1 EP 15708050 A EP15708050 A EP 15708050A EP 3107925 B1 EP3107925 B1 EP 3107925B1
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EP
European Patent Office
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added
process according
solution
lithium
reaction mixture
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EP15708050.8A
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German (de)
English (en)
French (fr)
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EP3107925A1 (en
Inventor
Sándor MAHÓ
Csaba SÁNTA
János CSÖRGEI
Gábor SZABÓ
Tamás SCHÄFER
Zoltán BÉNI
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Richter Gedeon Nyrt
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Richter Gedeon Nyrt
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Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07JSTEROIDS
    • C07J9/00Normal steroids containing carbon, hydrogen, halogen or oxygen substituted in position 17 beta by a chain of more than two carbon atoms, e.g. cholane, cholestane, coprostane
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07JSTEROIDS
    • C07J5/00Normal steroids containing carbon, hydrogen, halogen or oxygen, substituted in position 17 beta by a chain of two carbon atoms, e.g. pregnane and substituted in position 21 by only one singly bound oxygen atom, i.e. only one oxygen bound to position 21 by a single bond
    • C07J5/0046Normal steroids containing carbon, hydrogen, halogen or oxygen, substituted in position 17 beta by a chain of two carbon atoms, e.g. pregnane and substituted in position 21 by only one singly bound oxygen atom, i.e. only one oxygen bound to position 21 by a single bond substituted in position 17 alfa
    • C07J5/0053Normal steroids containing carbon, hydrogen, halogen or oxygen, substituted in position 17 beta by a chain of two carbon atoms, e.g. pregnane and substituted in position 21 by only one singly bound oxygen atom, i.e. only one oxygen bound to position 21 by a single bond substituted in position 17 alfa not substituted in position 16
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07JSTEROIDS
    • C07J21/00Normal steroids containing carbon, hydrogen, halogen or oxygen having an oxygen-containing hetero ring spiro-condensed with the cyclopenta(a)hydrophenanthrene skeleton
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07JSTEROIDS
    • C07J41/00Normal steroids containing one or more nitrogen atoms not belonging to a hetero ring
    • C07J41/0033Normal steroids containing one or more nitrogen atoms not belonging to a hetero ring not covered by C07J41/0005
    • C07J41/0077Normal steroids containing one or more nitrogen atoms not belonging to a hetero ring not covered by C07J41/0005 substituted in position 11-beta by a carbon atom, further substituted by a group comprising at least one further carbon atom
    • C07J41/0083Normal steroids containing one or more nitrogen atoms not belonging to a hetero ring not covered by C07J41/0005 substituted in position 11-beta by a carbon atom, further substituted by a group comprising at least one further carbon atom substituted in position 11-beta by an optionally substituted phenyl group not further condensed with other rings
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07JSTEROIDS
    • C07J51/00Normal steroids with unmodified cyclopenta(a)hydrophenanthrene skeleton not provided for in groups C07J1/00 - C07J43/00

Definitions

  • the present invention relates to a new process for the synthesis of 21-methoxy-pregnane derivatives of formula (I), wherein the meaning of R is dimethylamino or acetyl group, using methoxymethyl lithium reagent, there is also disclosed the intermediate of formula (III), wherein the meaning of R' is 2-methyl-1,3-dioxolan-2-yl group.
  • the hydroxyl group in position 17 of the commercially available 3,3-[1,2-ethanediyl-bis-(oxy)]-17 ⁇ -hydroxy-estr-5(10),9(11)-dien-17 ⁇ -carbonitrile was silylated with (bromomethyl)dimethylsilyl chloride. Then the 17-silyloxy bromo compound was transformed into 21-bromo compound using lithium diisopropylamide at -78°C.
  • Introduction of the methoxy group in position 21 was carried out in a rather complicated, multistep process: via the 21-acetoxy and 21-hydroxy derivatives, using 6 equivalent excess of trimethyloxonium tetrafluoroborate salt together with proton sponge (SNAP reaction). On one hand this method is expensive, on the other hand the removal of the proton sponge is difficult, in many cases it requires the purification of the product in several steps.
  • Alkoxymethyl lithium reagent has not been used so far in the synthesis of steroids.
  • the present invention relates to a new process for the synthesis of 21-methoxy-pregnane derivatives of formula (I), which has less steps as the known ones described above, it is industrially realizable, safe and economical.
  • the process differs from the one described in the patent application No. WO2009001148 , that the introduction of the side-chain in position 17 was carried out in a different way, with special regard to the introduction of the methoxy group in position 21.
  • introduction of the methoxy group can be carried out in a more simple way, in less steps than in the processes described above, if the compounds of formula (III) or (IV) are reacted with methoxymethyl lithium - synthesized preferably in situ - under proper conditions.
  • the present invention relates to a new process ( Figure 3.) for the synthesis of 21-methoxy-pregnane derivatives of formula (I) wherein the meaning of R is dimethylamino or acetyl group, to the synthesis of the methoxymethyl lithium reagent used in the process, there is also disclosed herein the intermediate of formula (III), wherein the meaning of R' is 2-methyl-1,3-dioxolan-2-yl group.
  • the hydroxyl group in position 5 of compound of formula (IV), wherein the meaning of R' is dimethylamino or 2-methyl-1,3-dioxolan-2-yl group, and synthesized according to method described in patent application No. WO2009001148 is silylated with chloro-trimethylsilane in the presence of imidazole in a halogenated solvent or tetrahydrofuran or toluene, preferably in dichloromethane, at room temperature to yield the compound of formula (III), wherein the meaning of R' is as described above.
  • the methoxymethyl lithium reagent is synthesized.
  • a condensed or conjugated aromatic hydrocarbon in given case substituted with alkyl groups for example naphthalene, alklylnaphthalene, anthracene, 4,4'-di-tertbutyl-biphenyl, preferably biphenyl, is dissolved in an ether, aliphatic or aromatic hydrocarbon or formaldehyde dialkylacetal type solvent, for example tetrahydrofuran, methyltetrahydrofuran, diethyl ether, diisopropyl ether, methyl-tertbutyl ether, toluene, dimethoxyethane, diethoxyethane, preferably tetrahydrofuran, and lithium metal is added to the so obtained solution under inert atmosphere.
  • alkyl groups for example naphthalene, alklylnaphthalene, anthracene, 4,4'-di-tertbuty
  • the reaction mixture is vigorously stirred for 0.5-5 hours, preferably for 3 hours, until the lithium is dissolved at 0-20°C, preferably at 5-10°C. Then the solution is cooled to (-78)-(-40)°C, preferably to -55°C, and methoxymethyl chloride in itself or in a solution of any of the above mentioned solvents is added to the mixture in such a rate as to keep the reaction temperature between (-78)-(-30)°C, preferably between (-55)-(-40)°C.
  • the solution of compound of formula (III) or (IV) is added to the so obtained solution at a temperature between (-78)-(-30)°C, preferably between (-55)-(-50)°C.
  • the reaction mixture is stirred at a temperature between (-78)-(-30)°C, preferably between (-48)-(-52)°C for 0.5-3 hours, preferably for 2 hours.
  • water is added to the reaction mixture in such a rate as to keep the reaction temperature below 0°C, preferably at -10°C.
  • the reaction mixture is vigorously stirred for 10-120 min, preferably for 30 min, while the temperature is allowed to rise to 10-15°C.
  • the solution containing the protected intermediate is treated with a strong acid, for example hydrochloric acid, sulphuric acid, p-toluenesulphonic acid, perchloric acid, methanesulphonic acid, phosphoric acid, potassium hydrogensulphate, preferably sodium hydrogensulphate, to yield the solution of the compound of formula (II), from which the compound of formula (II), wherein the meaning of R is dimethylamino or acetyl group, is isolated in a suitable way.
  • the obtained product in given case is purified by chromatography.
  • the hydroxyl group in position 17 is acetylated according to the method described in patent application No. WO2009001148 to yield the final product of formula (I), wherein the meaning of R is as described above.
  • the temperature of the reaction mixture was kept at 15-20°C. After 2 hours stirring was stopped, and after settling the phases were separated, the upper organic phase was washed with 2x100 ml of about 10v/v% sulphuric acid, and the water phases were combined. The combined water phases containing the steroid were extracted with 2x100 ml of cyclohexane. Then the water phase was added to a solution of 83.73 g of sodium carbonate in 3 L of water over a period of 10-15 min. The precipitated crystals were filtered off after 30 min stirring, washed several times with water until neutral pH. The product was dried at 40°C in vacuum oven until constant weight to yield 14.5 g (97.44%) of the title compound.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Steroid Compounds (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
EP15708050.8A 2014-02-17 2015-02-16 Process for the production of 21-methoxy-11-beta-phenyl-19-nor-pregna-4,9-diene-3,20-dione derivatives Active EP3107925B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
HU1400080A HU230381B1 (hu) 2014-02-17 2014-02-17 Ipari eljárás szteroid intermedier előállítására
PCT/IB2015/051124 WO2015121840A1 (en) 2014-02-17 2015-02-16 Process for the production of 21 -methoxy-11 -beta-phenyl-19-nor-pregna-4,9-diene-3,20-dione derivatives

Publications (2)

Publication Number Publication Date
EP3107925A1 EP3107925A1 (en) 2016-12-28
EP3107925B1 true EP3107925B1 (en) 2018-05-16

Family

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Family Applications (1)

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EP15708050.8A Active EP3107925B1 (en) 2014-02-17 2015-02-16 Process for the production of 21-methoxy-11-beta-phenyl-19-nor-pregna-4,9-diene-3,20-dione derivatives

Country Status (7)

Country Link
US (1) US9683010B2 (zh)
EP (1) EP3107925B1 (zh)
CN (1) CN106414475B (zh)
EA (1) EA032651B1 (zh)
ES (1) ES2682939T3 (zh)
HU (2) HU230381B1 (zh)
WO (1) WO2015121840A1 (zh)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015049637A1 (en) * 2013-10-01 2015-04-09 Richter Gedeon Nyrt. Industrial process for the synthesis of ulipristal acetate and its 4'-acetyl analogue

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6900193B1 (en) 1996-05-01 2005-05-31 The United States Of America As Represented By The Department Of Health And Human Services Structural modification of 19-norprogesterone I: 17-α-substituted-11-β-substituted-4-aryl and 21-substituted 19-norpregnadienedione as new antiprogestational agents
EP0900234B1 (en) 1996-05-01 2000-07-05 THE GOVERNMENT OF THE UNITED STATES OF AMERICA as represented by the SECRETARY OF THE DEPARTMENT OF HEALTH AND HUMAN SERVICES 21-substituted progesterone derivatives as new antiprogestational agents
EP1242444B1 (en) 1999-12-29 2005-07-20 THE GOVERNMENT OF THE UNITED STATES OF AMERICA, as represented by THE SECRETARY, DEPARTMENT OF HEALTH AND HUMAN SERVICES Process for preparing 17alpha-acetoxy-11beta- 4-n,n-(dimethylamino)phenyl]-21-methoxy-19-norpregna-4,9-diene-3,20-dione, intermediates useful in the process, and processes for preparing such intermediates
ES2546291T3 (es) 2000-03-17 2015-09-22 The Government Of The United States Of America As Represented By The Secretary Of The Department Of Health And Human Services 17-Alfa-sustituida, 11-beta-sustituida-4-arilo y 21-sustituida 19-norpregnadienodionas como agentes antiprogestacionales
HU228636B1 (en) * 2007-06-27 2013-04-29 Richter Gedeon Nyrt Industrial method for the synthesis of 17-acetoxy-11betha-4[-(dimethylamino)-phenyl]-21-methoxy-19-norpregna-4,9-dien-3,20-dione and the key intermediates of the process
TWI539953B (zh) * 2008-04-28 2016-07-01 瑞波若斯治療學公司 用於治療乳癌之組成物和方法
TWI477276B (zh) * 2008-04-28 2015-03-21 Repros Therapeutics Inc 抗黃體素給藥方案

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015049637A1 (en) * 2013-10-01 2015-04-09 Richter Gedeon Nyrt. Industrial process for the synthesis of ulipristal acetate and its 4'-acetyl analogue

Also Published As

Publication number Publication date
CN106414475B (zh) 2018-04-10
EA032651B1 (ru) 2019-06-28
HUE039403T2 (hu) 2018-12-28
US20160326211A1 (en) 2016-11-10
EP3107925A1 (en) 2016-12-28
HUP1400080A2 (en) 2015-09-28
US9683010B2 (en) 2017-06-20
ES2682939T3 (es) 2018-09-24
EA201691661A1 (ru) 2016-12-30
HU230381B1 (hu) 2016-03-29
CN106414475A (zh) 2017-02-15
WO2015121840A1 (en) 2015-08-20

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